leap year program using functions in python

def is_leap(year):

    leap = False

    

    # Write your logic here

    if year>= 1900 and year <=10**5:

        if (year % 4) == 0:

            if (year % 100) == 0:

                if (year % 400) == 0:

                     return True

                else:

                    return leap

            else:

                return True

        else:

            return leap

    

year = int(raw_input())

print(is_leap(year))